Core pump



May-25, 1937. A. c.. CATLANDy Y 2,081,194 l CORE P'UMP y Filed Aug. 21, 1934 fA/VE/vrok /QLFRLD C. CAT/.AND

I ATTORNEY Patented May 25, 1937 UNITED STATES PATENT OFFICE CORE PUMP v Application August 21, 19,34, Serial No. 740,797

6 Claims.y (Cl. 10S-38) This invention relates to a pump and relates more particularly to a core pump useful in forcing cores of earth formation from the barrels of well tools, etc. A general object of the present invention is to provide a simple, practical core pump that is efficient under various operating conditions.

Core pumps are employed to pass uid under pressure into the core barrels of core drills, etc. to force the cores therefrom. There are two general classes of core pumps now in use, namely single plunger pumps and double plunger pumps or compound pumps. The single plunger pumps that have been introduced are not entirely satisfactory because their rate of discharge or delivery is very low when high pressures are required to force a core from a barrel. The compound pumps or double plunger pumps are usually rather complex in their method of operation and are eX- pensive.

Another object of this invention is to provide a core pump that embodies only a single plunger and is, therefore, simple in operation and inexpensive of manufacture, and that is capable of delivering fluid in desirable quantities at low pressures and is capable of delivering fluid at high pressures as conditions may require.

Another object of the invention is to provide a core pump in which the pivotal axis of the handle or operating lever may be readily shifted at will to adapt the pump to deliver fluid at a high rate and a relatively low pressure when the core moves freely in the barrel, or to adapt the pump for delivering fluid at a lower rate and at a higher pressure when the core is more tightly packed in the barrel.

Another object of the invention is to provide a core pump of the character mentioned that includes a novel particularly eiiective connection between the operating lever and the cross head of the plunger that does not require manipulation or adjustment when the pivotal axis of the operp ating lever is changed or moved.

A further object of the invention is to provide a core pump of the character mentioned that is simple and inexpensive of manufacture and easy and convenient to operate.

The various objects and features of this invention will be fully understood from the following detailed description of a typical preferred form and application of the invention, throughout which descriptive reference is made to the accompanying drawing, in which:

Fig. 1 is a side elevation of the pump of the present invention showing it in position todeliver uid to acore barrel which has a portionl broken away to show the core.4 Fig. 2 is an enlarged top or plan view of the pump. Fig. 3 is an enlarged fragmentary longitudinal detailed sectional view taken substantially as indicated by line 3 3 on Fig. 1. Fig. 4 is a'fragmentary longitudinal detailed sectional view taken substantially as indicated by line 4 4 on Fig. 2. Fig. 5 is an enlarged transverse detailed sectional View of the valve means of the pump, being a view taken as` indicated by line 5 5 on Fig. 1, and Fig. 6 is an enlarged longitudinal detailedsectional view of the operating lever, the mounting of the lever and the vconnection between the lever and the cross head, being a View taken as indicated by line 6 6 on Fig. 1.

'Ihe core pump of the present invention includes generally, a cylinder and plunger assembly I0, a handle or operating lever II adapted to be pivoted at spaced points and an operatingconnection I2 between the lever II and the plunger of the assembly I0. f

In accordance with thebroader aspects of the invention the cylinder and plunger assembly I may be mounted or supported in any suitable manner. In theapplication of the invention dis- 25 closed in the drawing a base I3 serves to vcarry the assembly I0 as well as the other parts of the pump. The cylinder and plunger assembly I0 is preferably inclined or tilted as illustrated in Figs. 1 and 4 of the drawing. .The cylinder I4 30 of the assembly ID has its inner or lower end welded or otherwise attached to the base I3. A leg or support I extends from the upper portion of the cylinder I4 to the base I3 toy support the outer or upper portion of the assembly I0 on 35 the base. The assembly IU' includes a plunger I6 which enters the upper or outer end of the cylinder I4. Suitable packing means is provided for sealing about the plunger I6. In the particular construction illustrated the packing means includes packing I1 arranged in an annular recess in the cylinder I4 and a threaded gland I8 for compressing and holding the packing I'I in place.

The cylinder and plunger assembly I0 includes a valve means for controlling the intake and discharge of fluid from the cylinder I4. An enlargement or head I9 is provided on the lower end of the cylinder I4 and has an intake port 20 and a discharge port 2I. The ports 2l) and 2I communicate with the interior of the cylinder vIll at its lower end. The intake port may terminate in an internally threaded boss 22y whereby the port 2li may be connected with a suitable source or supply of fluid `(not shown). An in- 55 ternally threaded boss 23 may be provided at the outer end of the port 2 I. In the drawing I have shown a pipe 24 extending from the port 2| to a pressure head 25 applied to a core barrel B. A pusher or piston P is slidable in the barrel B and is adapted to be acted on by fluid pressure from the pump to force the core C from the barrel BJ A removable-valveseat.26.isvprovided in the intake port 2B and a ball 21 isadapted 'to seat outwardly against the seat 26, to prevent a reverse or outward flow through the port 20.. A removable plug 28 normally closes an access opening to the port 20 and a spring 29 is:.ar.-

ranged between the plug 428.and;.the ball.21 to seat 26. in the, delivery or discharge port 2I and a ball 3I seats inwardly against the seat '3D1to' prevent-'- a return flow into the cylinder from thel" ip6-24.7 An access openinggto the port 2l is closedby a removable plug; 32; A `spring- 33Jisarranged 'under compression between the inner side of the plug 32 and the ball `3| to urge the ball toits closed position-onthe seat 36: It is lbelieved vthat the operationl of the valve means' duringfthe recprocation ofthe plunger I6"will"be-readily understood. A

' The operatinglever II isadapted to bemannally pivoted-'or-operated to actuatelfthe plunger I6. It Vis `a feature'ofthe -inventionthat the operating lever Il is adaptedto be pivoted at a plurality'of spaced Ypoints to -vary='its mechanical advantage or leverage and thus-vary1theaction ofthe pump.- The operatingleverfll is-preferably' offrectang-ular cross section and is provided at its upper end with a suitable transversefhandle or manually engageable-L-rod 35i 'Iheflever II projects upwardlyj above: the` cylinder and plunger assembly I0- so thatits Yhandle 35.is readily engaged-for-operation. f

The-means for pivotally supportingthe. lever II includes two spaced parallellmembers 36 eX- tending upwardly from the--base-|3. The membersi'36 serve to support aguide' for the cross head of theplunger I 3`zas will.` be-:subsequently described: Thelower ends of V'the members 36 are welded or otherwise attached to-thebase I3." In-the preferred'construction the members k36V are disposed atsubstantially rightangles to the inclined lcylinder and plunger assemblyv I0." The operating lever- I I i passes downwardly- .l between. the members 361-with substantial clearance. Inaccordance with thewinvention the Ymembers :36 are provided withseriesAof longitudinally spaced alignedl openings 312 Inthe particular form of the invention\illustrated in Ythe -drawing there are Y-three pairs lof horizontally aligned openings 31, it being understood that ymoresets or `pairs of openings 31 maybe providedfif desired. The lowermost set or pair of aligned openings 31 may beadjacent the base I 3 lwhile thefuppermost pair ofopenings'31may Vbeadjacent.: the upper ends ofthe members36. A transverse Vopening 38`is provided in thelowerendportion ofrthe operating lever lltand-aaremovable pin 39is adaptedtto be passed through anyl one offthel pairs of openings 38 and the.openingrr38zrto.'.piv` otally support the lever; A key46 rmayfbeveme ployed to removably lockthe pini39f'in'positiorr. andggsuitable washers oruspacers 4I'rmay-"befpro-i vided ,on thepin at 'the opposite sides: offthe llever- I I .f The spacers 4 I .'may bevweldeds-orz otherwise: attached toithetfle'zverlll` It :will be apparent that-the removablelpinlrmayrbe =passedthrough any one ofthepairs ,of openings '.39 candithroughfi the opening 38 of the lever to pivotally support the lever at any one of the three spaced points to change the leverage of the lever and the operation of the pump.

The connection I2 between the operating lever II and the plunger I6 includes a cross head 42 on the projecting outer end of the plunger I6. A`guide-43 .extends longitudinallyyfromthe outer-.end of the cylinder I4-:to slidablysupport and guide the cross head 42. The members 36 described above have their upper ends attached to the guide 43 and aid in supporting the guide. Longitudinal slots 44 are provided in the upper and lower. sides. of the guide 43 and the operating.-1ever.v I I-.passes upwardly through the slots 44.-,to-2project-.abovethe guide. The cross head 42 of the plunger is lyoked, being provided with two f-spaced'larmse45; A bearing or block 46 is disposed-.between the arms 45. Pins 41 project from the arms 45 into openings 48 in the block 4l'to-pivotally' support the block in thecross head. An opening 43 -in the block 46 lsli'dably or shiftably passes theoperating lever II. Theopening :49? preferably corresponds in transverse cross section tothe` operating lever I I. Pivoting or oscillation of 2 the lever IIis .transmitted to the plunger I6 through the medium of the block 46:.and pins 41 'so that the plunger is reciprocated when uthe lever is pivoted back and forth. Theconnection.between-the operating lever II andthe cross head 42 allows/the operating lever I I ttowbef readilyy shifted-.- or moved longitudinally without ldisturbing the plunger, the cross head or any rof thef other parts.

In zemployingthe core pump of the present invention a pipe. 24 'may :extend from the. discharge port"2lf;to. the endof the barrel B so that the pump :mayrpass asuitable liquid under lpressure into the barrel; A pipe, (not'shownlmay conduct the liquid from a Suitable source to the intakeport20 Pivoting of therlever-II back and fort-lr'ofcourse results in-.reciprocationl of the plunger-A |61:v As the plunger 'I6-f is. reciprocated the-liq-uidfzisalternately drawn in through' the port 2llcand IdischargedthroughY the port 2|.' The liquid iunder'spressure: admitted intothe end of the barrelBK forces .thepusher or piston PV through the barrel I1to;force the'core from the o-uterend of :the barrel'. Int accordance with th'el invention thefpumpmay'b'e easilyy and-'quicklvmodied or adjusted 'to efliciently4 force coresnfrom the barrelszz-whenrthe cores move freely in the barrels-or whentpthecores are tightly packed in the barrels. Thefoperating'lever 'II may-have its lower'end pivotally- Y supported in any one of the spaced positions to change the mechanical advantage of the lever and the discharge rate of the pump.

When: the Aoperating rlever I I -is 4pivotally supportedfat-itszlowermost position,Y as illustrated in Fig.; Gwof fthe drawing,y the lever has the least mechanical advantage,:but,its operation provides furthe-:largest"dischargerate from the port 2|. The operating lever-I I maygbefsupportedin its lowestV positionrzwhen'the core C' is quite easily moved in thebarrel and-does not require a great force :to move itiout of rthebarrel. The high discharge rate of the pumpwhen the lever I I is piv-` oted iatits :lowest position provides forthe vrapid forcing of the icore Cifrom-the barrel B; When the core- C'is` moreY tightly set or packed Ainy thebarrel andfa' higher uid'pressure is required to force fitthroughgthe barrel lthe pin 39A may be.

removed and theflever II raised-to a position wherefthe-pinf139 may befpassed through either the intermediate for thefhighest pair rof openings 31 to support the lever in its intermediate or highest position. With the lever Il in its intermediate position its operation causes the pump to deliver liquid to the barrel B at a medium rate and at a medium pressure. When an extremely high fluid pressure is required to force the core C from the barrel B the pin 39 may be employed to pivotally support the lever Il in its highest position where the pin extends through the uppermost pair of openings 3l. The operation or pivoting of the lever Il when it is in its highest or uppermost position actuates the pump to deliver liquid under a high pressure but at a reduced rate. The liquid under the high pressure admitted to the end of the barrel B drives the piston P and the core C through the barrel.

It is to be particularly noted that the slidable pivotal connection l2 between the lever Il and the cross head 42 provides for the necessary relative movement between the lever and cross head during the operation of the pump and allows for the ready longitudinal adjustment of the lever ll between its various positions. The lever il in being slidable in the opening 49 may be shifted longitudinally when it is to be pivotally supported at the diierent positions without requiring the manipulation or adjustment of the connection I2, the cross head 42 or the plunger I6. The core pump embodying the means for pivotally supporting the operating lever at spaced points and the slidable pivotal connection between the operating lever and the plunger l 6 is readily adaptable to various operating conditions.

Having described only a typical preferred form and application of my invention, I do not wish to be limited or restricted to the specic form and application herein set forth, but wish to reserve to myself any modifications or variations that may appear to those skilled in the art or 4.0 fall within the scope of the following claims.

Having described my invention, I claim:

l. Mechanism for operating a core pump having a plunger including a lever for operating the plunger, a xed support having openings spaced 5 different distances from the axis of movement of the plunger, a removable pin adapted to be inserted in the openings to pivotably connect the lever to the support at any one of a plurality of spaced points, and means pivotably and shiftably connecting the lever with the plunger whereby the lever may be adjusted longitudinally to operate the plunger when pivoted at any one of said points, the last named means including a bearing pivotably connected with the plunger and having an opening shiftably passing the lever.

2. In a core pump having a reciprocable element, means for operating the element including a cross head on the element, an opelating lever, a relatively xed support, means for pivoting the lever to the support at any one of a plurality of definite points spaced different distances from f the axis of movement of the cross head, and a block pivoted to the cross head having an opening shiftably passing the lever whereby the lever may be adjusted longitudinally, and a guide for the cross head carried by the support and arranged parallel with the said element.

3. In a core pump, a base, an inclined cylinder having its lower end supported kon the base, a guide extending longitudinally from the upper end of the cylinder, a support extending upwardly from the base and carrying the guide, a plunger operable in the cylinder, a cross head on the plunger slidably carried by the guide, an operating lever pivotally and shiftably connected with the cross head, and means for pivotally connecting the lever with the support at any of a plurality of points spaced longitudinally of the support whereby the stroke of the plunger may be changed. l

4. In a core pump, a base, an inclined cylinder having its lower end supported on the base,

a guide extending longitudinally from the upper end of the cylinder, a support extending upwardly from the base and carrying the guide, a plunger operable in the cylinder, a cross head 0n the plunger slidably carried by the guide, an operating lever pivotally and shiftably connected with the cross head, there being longitudinally spaced openings in the support, and a pin adapted to be entered in any of the openings to pivotally connect the lever with the support at any one of a plurality of longitudinally spaced points.

5. A core pump including a base, an inclined cylinder having its lower end supported on the base, spaced guides projecting longitudinally from the upper end of the inclined cylinder, a plunger operable in the cylinder, a cross head on the plunger carried by the guides, a support extending upwardly from the base and carrying the guides, the support having vertically spaced openings, an operating lever extending vertically between the guides, and projecting upwardly therefrom for `manual actuation, means pivotably and shiftably connecting the lever with the cross head, and a pin adapted to be introduced into any one of the openings to pivotably connect the lever with the support.

6. In a core pump having a plunger, an operating means including a lever, means for pivotably supporting `the lever at any one of several points spaced different distances from the axis of movement of the plunger, and means operatively and shiftably connecting the lever with the plunger to allow longitudinal adjusting of the lever, the last named means including a yoke on the plunger, and a block pivoted in the yoke having an opening slidably passing vthe lever, and guides in parallel relation to the plunger slidably guiding the yoke and spaced aparty so that the lever may extend therebetween.

ALFRED C. CA'I'LAND. 

